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Essexite  and Epidosite


Epidosite and Essexite 


Definition

Definition
Essexite which is also known as nepheline monzogabbro, is a dark gray or black holocrystalline plutonic Iigneous Rock   
Epidosite is a highly altered epidote and quartz bearing rock which is a type of metasomatite, essentially altered basalt   

History
  
  

Origin
USA   
Unknown   

Discoverer
Unknown   
Unknown   

Etymology
From the locality in Essex County, Massachusetts,US   
Not Available   

Class
Igneous Rocks   
Igneous Rocks   

Sub-Class
Durable Rock, Hard Rock   
Durable Rock, Medium Hardness Rock   

Family
  
  

Group
Plutonic   
Volcanic   

Other Categories
Fine Grained Rock, Opaque Rock   
Coarse Grained Rock, Fine Grained Rock, Opaque Rock   

Texture

Texture
Granular   
Glassy, Massive, Porphyritic, Scoriaceous, Vesicular   

Color
Dark Grey to Black   
Black, Brown, Light to Dark Grey   

Maintenance
Less   
Less   

Durability
Durable   
Durable   

Water Resistant
Yes   
Yes   

Scratch Resistant
Yes   
Yes   

Stain Resistant
Yes   
Yes   

Wind Resistant
Yes   
Yes   

Acid Resistant
No   
No   

Appearance
Banded   
Dull and Soft   

Uses

Architecture
  
  

Interior Uses
Decorative Aggregates, Homes, Interior Decoration   
Decorative Aggregates, Floor Tiles, Homes, Hotels, Interior Decoration   

Exterior Uses
As Building Stone, As Facing Stone, Garden Decoration, Office Buildings, Paving Stone   
As Facing Stone, Garden Decoration, Office Buildings, Paving Stone   

Other Architectural Uses
Curbing   
Curbing   

Industry
  
  

Construction Industry
As Dimension Stone, Building houses or walls, Cement Manufacture, Construction Aggregate, for Road Aggregate   
As Dimension Stone, Cobblestones, Rail Track Ballast, Roadstone   

Medical Industry
Not Yet Used   
Not Yet Used   

Antiquity Uses
Artifacts, Monuments, Sculpture, Small Figurines   
Artifacts, Monuments, Sculpture, Small Figurines   

Other Uses
  
  

Commercial Uses
Cemetery Markers, Commemorative Tablets, Jewelry, Sea Defence, Tombstones   
Commemorative Tablets, Creating Artwork   

Types

Types
Not Available   
Alkaline Basalt, Boninite, High Alumina Basalt, Mid Ocean Ridge Basalt (MORB), Tholeiitic Basalt, Basaltic trachyandesite, Mugearite and Shoshonite   

Features
Is one of the oldest rock, Smooth to touch   
Has High structural resistance against erosion and climate, Very fine grained rock   

Archaeological Significance
  
  

Monuments
Used   
Used   

Famous Monuments
Data Not Available   
Data Not Available   

Sculpture
Used   
Used   

Famous Sculptures
Data Not Available   
Data Not Available   

Pictographs
Not Used   
Used   

Petroglyphs
Not Used   
Used   

Figurines
Used   
Used   

Fossils
Absent   
Absent   

Formation

Formation
Essexite is a type of igneous rock, which is usually dark grey to black plutonic rock. For the formation of essexite, suitable magma with exact composition of K, Ba, Rb, Cs, Sr should be produced.   
Epidosite is a fine-grained, hard rock which is a type of metasomatite, essentially altered basalt. It forms with or without crystallization, either below the surface as intrusive rocks or on the surface as extrusive rocks.   

Composition
  
  

Mineral Content
Augite, Feldspar, Hornblende, Nepheline, Olivine, Plagioclase, Pyroxene   
Olivine, Plagioclase, Pyroxene   

Compound Content
Aluminium Oxide, Ba, Ca, Cs, Potassium, Rb, Sodium, Sr   
Aluminium Oxide, CaO, Iron(III) Oxide, FeO, Potassium Oxide, MgO, MnO, Sodium Oxide, Phosphorus Pentoxide, Silicon Dioxide, Titanium Dioxide   

Transformation
  
  

Metamorphism
Yes   
Yes   

Types of Metamorphism
Burial Metamorphism, Cataclastic Metamorphism, Contact Metamorphism, Hydrothermal Metamorphism, Impact Metamorphism   
Burial Metamorphism, Cataclastic Metamorphism, Hydrothermal Metamorphism, Impact Metamorphism   

Weathering
Yes   
Yes   

Types of Weathering
Biological Weathering, Chemical Weathering   
Biological Weathering, Chemical Weathering, Mechanical Weathering   

Erosion
Yes   
No   

Types of Erosion
Coastal Erosion, Glacier Erosion, Water Erosion   
Not Applicable   

Properties

Physical Properties
  
  

Hardness
7   
6   

Grain Size
Fine Grained   
Fine to Coarse Grained   

Fracture
Conchoidal   
Conchoidal   

Streak
Black   
White to Grey   

Porosity
Highly Porous   
Less Porous   

Luster
Not Available   
Not Available   

Cleavage
Not Available   
Not Available   

Toughness
1.6   
2.3   

Specific Gravity
Not Available   
2.8-3   

Transparency
Opaque   
Opaque   

Density
Not Available   
Not Available   

Thermal Properties
  
  

Resistance
Impact Resistant, Pressure Resistant, Wear Resistant   
Heat Resistant, Pressure Resistant, Wear Resistant   

Reserves

Deposits in Eastern Continents
  
  

Asia
India, Russia   
India, Russia   

Africa
South Africa   
South Africa   

Europe
Germany, Greece, Italy, Scotland, Turkey   
Iceland   

Others
Greenland   
Not Yet Found   

Deposits in Western Continents
  
  

North America
Canada, USA   
Canada, USA   

South America
Brazil, Colombia, Venezuela   
Brazil   

Deposits in Oceania Continent
  
  

Australia
New Zealand, Queensland   
Not Yet Found   

Summary >>
<< Reserves

All about Essexite  and Epidosite Properties

Know all about Essexite  and Epidosite properties here. All properties of rocks are important as they define the type of rock and its application. Essexite  and Epidosite belong to Igneous Rocks.Texture of Essexite  is Granular whereas that of Epidosite is Glassy, Massive, Porphyritic, Scoriaceous, Vesicular. Essexite  appears Banded and Epidosite appears Dull and Soft. The luster of Essexite  and Epidosite is not available. Essexite  is available in dark grey to black colors whereas Epidosite is available in black, brown, light to dark grey colors. The commercial uses of Essexite  are cemetery markers, commemorative tablets, jewelry, sea defence, tombstones and that of Epidosite are commemorative tablets, creating artwork.

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